Introduction: Exploding Pen !
Disclaimer: I am not responsible for any injuries such as bruises, scratches, or drawn-on items.
Step 1: Gather Items
Gather one "Pentel Wow! bk440" pen and a random pen that uses a spring.
Someone to prank.
Step 2: Dissasemble the Pens
This should come natural to you, you should be a hacker !
While doing this you should make sure that you separate the pieces so you know which goes in to the "Pentel Wow! bk440' pen case in the next step.
Step 3: Insert Spring
So, seeing that you've come this far I'll show you how to do this. Take the spring from the random pen and drop it into the "Pentel Wow ! bk440" pen case.
Step 4: Assemble Pen
Assemble the pen the way you found it, by dropping in the ink cartridge and and pushing the clicky-thingy back in.
Step 5: How to Prank Someone With the Pen
Give somebody, preferably a person that wouldn't mind a nudge of humor, the pen and ask them how to disassemble the pen. If you built it correctly the button, ink cartridge, and second spring should shoot out at them.
We have a be nice policy.
Please be positive and constructive.